Sol-gel mediated surface modification of nanocrystalline NiFe2O4 spinel powders with amorphous SiO2

被引：23

作者：

Vivekanandhan, S. ^{[1
,4
,5
]}

Venkateswarlu, M. ^{[2
]}

Carnahan, D. ^{[3
]}

Misra, M. ^{[4
,5
]}

Mohanty, A. K. ^{[4
,5
]}

Satyanarayana, N. ^{[1
,5
]}

机构：

[1] Pondicherry Univ, Dept Phys, Pondicherry 605014, India

[2] Amara Raja Batteries Ltd, Res & Dev, Thirupathi 517520, Andhra Pradesh, India

[3] NanoLab Inc, Newton, MA 02458 USA

[4] Univ Guelph, Sch Engn, Guelph, ON N1G 2W1, Canada

[5] Univ Guelph, Dept Plant Agr, Bioprod Discovery & Dev Ctr, Guelph, ON N1G 2W1, Canada

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 04期

关键词：

Sol-gel processes; Electron microscopy; Magnetic properties; Ferrites; COATED RHODIUM NANOPARTICLES; MAGNETIC-PROPERTIES; SILICA; MORPHOLOGY; GLYCOL;

D O I：

10.1016/j.ceramint.2012.10.265

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Surface modification of nanocrystalline NiFe2O4 spinel particles with amorphous SiO2 by the sol-gel process at 350 degrees C was demonstrated. Amorphous phase of the SiO2 layer was evaluated by X-ray diffraction technique. Structural coordination of the pristine and SiO2 coated NiFe2O4 particles as investigated by employing FTIR analysis. Thickness of the SiO2 layer was investigated through transmission electron microscopy and it was identified to be similar to 10-23 nm over nanocrystalline NiFe2O4 particles. The magnetic behavior of pristine and surface modified NiFe2O4 particles were investigated using vibrating sample magnetometer (VSM). Magnetic studies showed the retention of magnetic property of surface modified NiFe2O4 particles with the reduced saturation magnetization and coercivity compared to the pristine NiFe2O4 particles, which is respectively due to the lower fraction of the magnetic component and the formation of interfacial structure. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：4105 / 4111

页数：7

共 38 条

[1]

[Anonymous], J APPL PHYS

[2]

[Anonymous], 2004, J AM CERAM SOC, DOI DOI 10.1111/J.1151-2916.2000.TB01243.X

[3] Laser pyrolysis preparation of SiO2-coated magnetic nanoparticles for biomedical applications [J].

Bomatí-Miguel, O ;

Leconte, Y ;

Morales, MP ;

Herlin-Boime, N ;

Veintemillas-Verdaguer, S .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2005, 290 :272-275

[4] Silicon dioxide coating of CeO2 nanoparticles by solid state reaction at room temperature [J].

Cui, HT ;

Hong, GY ;

Wu, XY ;

Hong, YJ .

MATERIALS RESEARCH BULLETIN, 2002, 37 (13) :2155-2163

[5]

Gavrilenko K. S., 2002, THEOR EXP CHEM, V38, P118, DOI [10.1023/A:1016044218609, DOI 10.1023/A:1016044218609]

[6] Formation of nanocrystalline NiFe2O4 [J].

Gotic, M ;

Czako-Nagy, I ;

Popovic, S ;

Music, S .

PHILOSOPHICAL MAGAZINE LETTERS, 1998, 78 (03) :193-201

[7] Synthesis and surface engineering of iron oxide nanoparticles for biomedical applications [J].

Gupta, AK ;

Gupta, M .

BIOMATERIALS, 2005, 26 (18) :3995-4021

[8] Nanocomposites NiFe2O4/SiO2 and CoFe2O4/SiO2-preparation by sol-gel method and physical properties [J].

Hutlova, A ;

Niznansky, D ;

Plocek, J ;

Bursik, J ;

Rehspringer, JL .

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2003, 26 (1-3) :473-477

[9] Preparation of silica-coated rhodium nanoparticles using water-in-oil microemulsion [J].

Kishida, M ;

Tago, T ;

Hatsuta, T ;

Wakabayashi, K .

CHEMISTRY LETTERS, 2000, (09) :1108-1109

[10] Magnetic nanoparticles [J].

Kodama, RH .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 200 (1-3) :359-372

← 1 2 3 4 →